21796604928 has 660 divisors, whose sum is σ = 78609909312. Its totient is φ = 5991874560.

The previous prime is 21796604923. The next prime is 21796604933. The reversal of 21796604928 is 82940669712.

21796604928 is a `hidden beast` number, since 2 + 1 + 7 + 9 + 6 + 604 + 9 + 28 = 666.

It is an interprime number because it is at equal distance from previous prime (21796604923) and next prime (21796604933).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (21796604923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 125991850 + ... + 125992022.

Almost surely, 2^21796604928 is an apocalyptic number.

21796604928 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21796604928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39304954656).

21796604928 is an abundant number, since it is smaller than the sum of its proper divisors (56813304384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21796604928 is a wasteful number, since it uses less digits than its factorization.

21796604928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250 (or 216 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 21796604928 in words is "twenty-one billion, seven hundred ninety-six million, six hundred four thousand, nine hundred twenty-eight".